mxc: changes to common plat-mxc code to add support for i.MX5

Prepare for i.MX5 SoC code by adding the relevant macros to common plat-mxc
code.

Signed-off-by: Amit Kucheria <amit.kucheria@canonical.com>
diff --git a/arch/arm/plat-mxc/include/mach/mxc.h b/arch/arm/plat-mxc/include/mach/mxc.h
index 800ae2a..a790bf2 100644
--- a/arch/arm/plat-mxc/include/mach/mxc.h
+++ b/arch/arm/plat-mxc/include/mach/mxc.h
@@ -30,6 +30,7 @@
 #define MXC_CPU_MX27		27
 #define MXC_CPU_MX31		31
 #define MXC_CPU_MX35		35
+#define MXC_CPU_MX51		51
 #define MXC_CPU_MXC91231	91231
 
 #ifndef __ASSEMBLY__
@@ -108,6 +109,18 @@
 # define cpu_is_mx35()		(0)
 #endif
 
+#ifdef CONFIG_ARCH_MX5
+# ifdef mxc_cpu_type
+#  undef mxc_cpu_type
+#  define mxc_cpu_type __mxc_cpu_type
+# else
+#  define mxc_cpu_type MXC_CPU_MX51
+# endif
+# define cpu_is_mx51()		(mxc_cpu_type == MXC_CPU_MX51)
+#else
+# define cpu_is_mx51()		(0)
+#endif
+
 #ifdef CONFIG_ARCH_MXC91231
 # ifdef mxc_cpu_type
 #  undef mxc_cpu_type